Floating, resilient sealing frame for coke oven doors



' FLOATING,

States ..Patet1t O RESIUENT SEALING FRAME FOR COKE OVEN DOORS rim, Pittsburgh, 2a., assignor to Koppers Company, Inc, a corporation of Delaware Application lMarch 1 1954, Serial No. 415,296

SClainis. (Cl. 202-248) ,The' pres'ent invention relates to oven doors and more particularly to a compressible self-sealing apparatus for acokeov'en door. j In the prior art various devices have been used with a coke oven door to obtain effective sealingconditions when the door is'p'ushed closed against thedoorjamb frame of (he coking chamber. For example, knifeblades have been mounted along the periphery of the door to contact a sealing surface provided on the doorjamb frame. Other arrangements such as a jointing metallic seal having a rounded surface for contacting the sealing surface of the doorjamb frame, the seal being attached to a sealing frame that is clamped to the body of the door, have also been suggested.

The present invention provides an improved self-sealing device that permits the maintenance of uniform contact throughout regardless of any warping that might occur due to the high temperatures of the coke oven.

Another feature of the present invention is to provide a coke oven door which has a self-sealing device that can be readily removed and replaced.

Still another feature of the present invention is to provide a coke oven door which has a compressible sealing device that is held in place even though the door is not in contact with the doorjamb frame.

Another feature of the present invention is to provide a coke oven door which has a compressible self-sealing device that is economical in its maintenance and construction.

More particularly, the present invention provides in combination with a coke oven door adapted to cooperate in parallelism with a coking chamber doorjamb frame having an outer plane sealing surface surrounding the opening therethrough, a readily removable and accessible resilient sealing frame member fioatingly positioned as a freely bodily movable element in a removable retainer frame therefor, on the door between that side of the door facing the coking chamber and the sealing surface of the doorjamb frame, with the portion of the sealing frame that contacts the sealing surface on the door jamb frame always exposed in both the on and off positions of the door, a tight seal being obtained between the door and the doorjamb frame when the door is pushed to closed position regardless of any planar distortions that might exist in the doorjamb frame and the door.

It will be obvious to one skilled in the art that various changes can be made in the arrangement, form, construction and type of the elements disclosed hereinafter without departing from the scope or spirit of this invention.

Reference will now be made to the accompanying drawing which illustrates and exemplifies an embodiment of the apparatus of the invention in a preferred type of construction.

In the drawing, a portion of coke oven 2 is disclosed having buckstays 3 mounted on the outer wall thereof as is well-known in the art. Positioned at one end of a coking chamber 4 in the coke oven is the doorjamb frame 6 which is mounted on the wall of the coke oven 2 by 2,744,858 Ho e a a z means of the bolts sgnuts 11, and spring washers 10. As is also well thrown in *the art, asbestos insulating material '9 is provided between the door iamb frame and the-oven'wall.

Cooperating 'with the doorjamb frame -'6 is a door 12. A refractory door plug =16 which fits into the entrance of chamber :4 is held on the door 12 by 'means 15f the retainer angle frame member 14 fixed to the door. "The door :is provided further with a rear dlamping plate @0, :held theneto flay means of bolts 22. Positioned between clampingplate 20 and the plug 16 is refractory insulating material 1'8. A :front clamping plate 24 held on the door 12 by means of nut and bolt assemblies '26. Since the aforedescr'ibed stnucture is well known in the art, further details are not-given herein.

Attached to theouter perip'hery of thedoor 12 of removable bol ts 30 ts one leg of -a removable sealing ring retainer frame 28, the frame being so positioned that the other leg turns inwardly in a direction toward the refractory plug 16 to form :a slot between itself and that surface of the door' which faces' the coleingohambier. "Fioatingly positioned'w'ithinthis slot,- as shown onthe drawhrg, ingover lapping relation with the other Slog of the removable sealing ring retainer frame is one leg of a sealing ring, preferably in the form of a resilient sealing frame member, and more specifically one in the form of a spring clip sealing ring member 32. The sealing ring 32 has a rounded head portion 34 that is adapted for parallel contact with the conventional sealing surface therefor on the doorjamb frame 6 as shown, when the door is pushed closed. A steel bar 35 is positioned at the center of sealing ring 32 to prevent the sealing ring from being deformed past its elastic limit. It is to be understood that various shaped resilient members can be utilized in place of the spring clip disclosed to cooperate with the door and jamb frame as a sealing member upon closing the door and to be floatingly positioned upon the door when it is opened.

It is to be understood further that the sealing ring retainer frame 28 and the spring clip sealing ring 32 extend completely around the outer periphery of the door. When the door is closed and the sealing ring compressed, latches are dropped into position, as is well known in the art, to hold the door tightly against the jamb frame 6. Any number of latches may be used with the present invention; however, in a preferred embodiment five (5) latches are provided in order to insure a uniform pressure against the sealing member along the full height of the door.

It is to be noted that although only a spring clip sealing member is disclosed with diverging legs, other types of resilient sealing members can also be used. For example, silicon rubber or other plastic material designed to withstand high temperature can be used. The resiliency of such sealing rings permits a uniform contact throughout, providing a tight seal regardless of any differential warping which might take place during coking operations.

The invention claimed is:

1. In combination with a coke oven door adapted to cooperate with a coking chamber door jamb frame having an outer plane sealing surface surrounding the opening therethrough, a resilient sealing frame in parallelism with said sealing surface and positioned on said door in floating relation thereon between that side of said door facing said coking chamber and said sealing surface of said door jamb frame, a tight seal being obtained between said door and said door jamb frame when said door is pushed to closed position regardless of any planar distortions that might exist in said door jamb frame and said door, and removable means for retaining the resilient sealing frame in position for sealing on the door while allowing for its floating-action thereon as a freely tacts the sealing surface on the door iamb frame always exposed in both the on and off positions of the door.

2. -In combination-with a coke oven door adapted to cooperate with a coking chamber door iamb frame having an outer plane sealing surface surroundingthe opening therethrough, a sealing ring retainer frameproviding ajretaining slot and removably. positioned along the periphery-of said door' on the side thereof which faces the coking chamber, a' resilient sealing ring floatingly' mounted in said slot in position to cooperate parallelly with said sealing surfaceof said door jamb frame ,to form a tight seal between the door and the frame when said 'door is closed regardless of any planar distortions that-might exist in said door jamb frame andtsaid door, the-portions of the. resilient sealing ring when in said slot being of lesser thickness than the depth of the slot, for free movement bodily as an element therein, and the remaining portion of the resilient sealing ring that contacts the sealing surface on the door iamb-frame always being exposed in both the on and 01? positions of the door.

3. The apparatus of claim 2, and in which said sealing ring retainer frame is constituted of an angle member, one

leg of which is removably attached to the periphery of said door and the other leg of which overlaps the resilient sealing ring and forms a slot, between itself and that bodily movable element with the portionof the.. scaling frame that con surface o f said door which of a depth greater than the depth of the resilient sealing faces the coking chamber,

ring that it overlaps for free movement of the resilient sealing ring bodily as a unitary whole relative to the angle member and the rest of the door.

4. The apparatus of claim 2, and in which said resilient sealing ring comprises a spring clip having outwardly diverging legs with one leg adapted to overlap in floating relation in the slotof the sealing ring retainer frame.'

5. The apparatus 'of claim 3, and 'a spring limiting means in said slot adapted to limit said resilient sealing ring against deformation past its elastic limit. i

References Cited in the file of'this patent UNITED STATES PATENTS 1,765,642 Wilhelm June 24, 1930 1,780,992 Beckers Nov. 11, 1930 1,873,076 Van Ackeren Aug. 23 1932 1,880,600 Umbel Oct. 4, 1932 1,958,305 Kent May 8, 1934 1,965,273 Wilson July 3, 1934 2,072,537 Van Ackeren Mar. 2, 1937 2,200,403 Van Ackeren May 14, 1940 2,478,215 Van Ackeren Aug. 9, 1949 2,579,917 Fourmanoit Dec. 25, 1951 2,662,053 Brown Dec. 8, 1953 

1. IN COMBINATION WITH A COKE OVEN DOOR ADAPTED TO COOPERATE WITH A COKING CHAMBER DOOR JAMB FRAME HAVING AN OUTER PLANE SEALING SURFACE SURROUNDING THE OPENING THERETHROUGH, A RESILIENT SEALING FRAME IN APRALLELISM WITH SAID SEALING SURFACE AND POSITIONED ON SAID DOOR IN FLOATING RELATION THEREON BETWEEN THAT SIDE OF SAID DOOR FACING SAID COKING CHAMBER AND SAID SEALING SURFACE OF SAID DOOR JAMB FRAME, A TIGHT SEAL BEING OBTAINED BETWEEN SAID DOOR AND SAID DOOR JAMB FRAME WHEN SAID DOOR IS PUSHED TO CLOSED POSITION REGARDLESS OF ANY PLANAR DISTORTIONS THAT MIGHT EXIST IN SAID DOOR JAMB FRAME AND SAID DOOR, AND REMOVABLE MEANS FOR RETAINING THE RESILIENT SEALING FRAME IN POSITION FOR SEALING ON THE DOOR WHILE ALLOWING FOR ITS FLOATING ACTION THEREON AS A FREELY BODILY MOVABLE ELEMENT WITH THE PROTION OF THE SEALING FRAME THAN CONTACTS THE SEALING SURFACE ON THE DOOR JAMB FRAME ALWAYS EXPOSED IN BOTH THE ON AND OFF POSITIONS OF THE DOOR. 